Yes! A complete RCA EMT 12 Page Brochure has
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EMT 1950 This was an inexpensive table model that was designed with use in high schools and small colleges in mind.. As I recall
it had lenses made of permanent magnets to eliminate the need for lens power supplies and to hold the cost down.
-Wilbur C. Bigelow, Prof. Emeritus
Materials Sci. & Engr., University of Michigan

New Instrument Expected to Have
Wide Usage in
Colleges, Hospitals and Industrial Laboratories

SPECIMENS TO BE OBSERVED IN THE TABLE MODEL ELECTRON

MICROSCOPE
(SEE FRONT COVER) ARE INSERTED INTO THE INSTRUMENT THROUGH THE SMALL ROD
SHOWN ABOVE.

A new, advanced model of the electron
microscope, much lower in cost, less complex and only 30 inches high, has
been developed by RCA and will be placed on the market later this year.

Features of the new microscope -its
reduction in bulk, complexity and cost-are expected to appeal particularly
to many colleges, hospitals and industrial laboratories.

In announcing the instrument, Dr. John
H. Reisner, its designer; Dr. James Hillier, research physicist of RCA
Laboratories and co-developer of the original RCA electron
microscope, and Dr. Richard G. Picard, manager of the RCA
Scientific Instruments Engineering, described its structure and
principles, and demonstrated its operation.

Of special significance, Dr. Hillier
said, is the fact that the lower end of the magnification range of
the new instrument overlaps that of the conventional light or
optical microscope, permitting the studentto
progress by stages from the known to the unknown. He may thus relate the
particles and structural details he observes to those made familiar to him
by the optical microscope, before advancing to higher magnifications which
disclose a vast amount of new detail that he might otherwise be
unable to identify.

Equally important, it was pointed out,
is the simplicity of operation achieved in the new design, which
makes the instrument safe foroperation in the hands
of a high school student or unskilled laboratory personnel. With no
more than an hour of instruction, it was asserted, an operator
generally familiar with the optical microscope should be able to insert
specimens and produce well-focused pictures.

Dr. Reisner said that a unique advantage
in time-saving and convenience is afforded by an engineering advance which
for the first time permits insertion of specimens into the
evacuated column, and their removal, without breaking the vacuum. In
addition, he said, photographic plates may be changed without admitting
more than a small amount of air to the column. As a result, pumping
time between plates is reduced to only 90 seconds, which is just
about enough time for the photographic development normally carried out
between exposures.

Marked Simplicity Achieved

Marked simplicity, Dr. Picard said, is
achieved without sacrifice of high-quality performance by means of a
combination of design factors, including an entirely new electron optical
system employing permanent magnet lenses instead of the conventional
electromagnetic or electrostatic lenses. Through the use of permanent
magnets, he explained, usual stability is permanently achieved and many
controls and components are eliminated.

Incorporating "new approaches to
the problem of energizing magnetic lenses, new means of introducing
specimens and photographic plates into the vacuum enclosure, and a new
means of alignment ofoptical
components," he said, the instrument was developed specifically to
meet "the microscope problems now clearly defined by experience, by simplifying
constructional design to essentials, and by utilizing new materials in an
integrated design".

By retaining the high voltage ofthe
much larger Universal Model, Dr. Reisner explained that greater
penetration of the specimen is achieved, thereby producing a more
detailed image. Thick specimens such as replicas and tissue sections may
be studied by means of the new microscope, he added.

Methods of mounting and
introducing the specimen are simple and easily mastered. To change
specimens the operator needs only to pull out of the column a
sliding rod containing the specimen holder, make the change, and push the
rod back in place. A new type of specimenholder
facilitates pre-preparation of specimens, so that production-line
procedures may be followed in running one specimen after another
without any delay.

Portable
electron microscope, developed by RCA,
widens research in universities, industries, hospitals.

new instructor gets a hearty welcome

You've read, in both newspapers and magazines, about the powerful
electron microscope. Now this amazing "instructor" of
scientists and physicians becomes even more useful - in more
research fields.

Through
basic principles uncovered at RCA Laboratories, RCA engineers have
developed a compact "table model" electron microscope,
at a price which makes it practical for use in an increased number
of universities, industries, hospitals, clinics. So simplified is
the new instrument that a high school student or unskilled
laboratory technician can quickly learn to use it!

Magnifications
of 6000 times can be obtained
directly in RCA's portable electron
microscope-four times that of ordinary light microscopes - and photography
lifts this to 30,000! A new "instructor,"
yes - and
one that gets a very hearty welcome.

RCA
research develops better scientific instruments, and better
television instruments
for you- RCA Victor's
1951 home television receivers.

RADIO
CORPORATION of
AMERICAWorld Leader in Radio - First-
in Television

(info from a 1950's
National Geographic Ad)

Everyday we rescue items you
see on these pages!
What do you have hiding in a closet or garage?
What could you add to the museum displays or the library?